at76c503 on sun ultra 10

Well I searched and found some info on the web about the call-clobbered 
error:

/lib/modules/2.4.26-sparc/build/include/asm/page.h:112: warning: 
call-clobbered register used for global register variable

 and modified my CFLAGS in the Makefile

    CFLAGS = -O2 -Wall -Wstrict-prototypes -pipe -fno-strict-aliasing \
             -Wno-trigraphs \
             -mcpu=ultrasparc -m64 -fomit-frame-pointer -mno-fpu \
             -mcmodel=medlow -ffixed-g4 -fcall-used-g5 -fcall-used-g7 \
             -Wa,--undeclared-regs -DMODULE\
             $(FW_DL) \
             -fno-common -Wno-sign-compare -Wno-unused

Everything compiles cleanly except at76c503.c

    sparc64-linux-gcc -MD -O2 -Wall -Wstrict-prototypes -pipe
    -fno-strict-aliasing -Wno-trigraphs -mcpu=ultrasparc -m64
    -fomit-frame-pointer -mno-fpu -mcmodel=medlow -ffixed-g4
    -fcall-used-g5 -fcall-used-g7 -Wa,--undeclared-regs -DMODULE 
    -fno-common -Wno-sign-compare -Wno-unused -D__KERNEL__ -DMODULE
    -DEXPORT_SYMTAB -DDRIVER_VERSION=\"v0.12beta11\"
    -I/lib/modules/2.4.26-sparc/build/include -DMODVERSIONS -include
    /lib/modules/2.4.26-sparc/build/include/linux/modversions.h
    -nostdinc -I
    /usr/lib/gcc-lib/sparc64-unknown-linux-gnu/3.3.3/include -c at76c503.c
    at76c503.c: In function `rx_mgmt_beacon':
    at76c503.c:3062: warning: int format, different type arg (arg 3)
    at76c503.c: In function `at76c503_do_probe':
    at76c503.c:6612: warning: unsigned int format, different type arg
    (arg 8)
    at76c503.c:6612: warning: unsigned int format, different type arg
    (arg 10)

I am still getting "wlan0: no wireless extensions"

    iwconfig --version
    iwconfig  Wireless-Tools version 27
              Compatible with Wireless Extension v11 to v16.
     
    Kernel    Currently compiled with Wireless Extension v16.

dmesg output:

eth0: Link is up using internal transceiver at 10Mb/s, Half Duplex.
hub.c: new USB device 02:03.0-3, assigned address 2
usb.c: USB device 2 (vend/prod 0x66b/0x2211) is not claimed by any 
active driver.
usbdfu.c: USB Device Firmware Upgrade (DFU) handler v0.12beta11 loading
at76c503.c: Generic Atmel at76c503/at76c505 routines v0.12beta11
at76c503-fw_skel.c: Atmel at76c503 (i3861) Wireless LAN Driver 
v0.12beta11 loading
usb.c: registered new driver at76c503-i3861
at76c503-fw_skel.c: using compiled-in firmware
at76c503.c: $Id: at76c503.c,v 1.53 2004/04/16 19:06:02 jal2 Exp $ 
compiled May 4 2004 20:53:52
at76c503.c: firmware version 0.90.0 #2 (fcs_len 4)
at76c503.c: device's MAC 00:04:5a:c8:b1:02, regulatory domain <unknown> 
(id 255)at76c503.c: registered wlan0
sys32_ioctl(iwconfig:1446): Unknown cmd fd(3) cmd(00008b1a) arg(effffce0)
sys32_ioctl(iwconfig:1457): Unknown cmd fd(3) cmd(00008b04) arg(effffd10)
at76c503.c: using BSSID 02:00:8c:46:67:00

I feel like I am very close.  Can anyone suggest why the driver doesn't 
appear to have wireless extensions?

Thanks,
Charles